Count Sergei Yulyevich Witte (, Sergey Yul'evich Vitte [pronounced ви́тэ ('vitɛ)]) (), also known as Sergius Witte, was a highly influential policy-maker who presided over extensive industrialization within the Russian Empire. He served under the last two emperors of Russia. He was also the author of the October Manifesto of 1905, a precursor to Russia's first constitution, and Chairman of the Council of Ministers (Prime Minister) of the Russian Empire.